Shadowless light source device with multidirectional lighting function

Abstract

The utility model discloses a shadowless light source device capable of illuminating in multiple directions. The shadowless light source device comprises a shell, a lamp panel and a diffusion plate, the diffusion plate is arranged in the shell and divides the inner space of the shell into an installation space and a storage space, the lamp panel is fixed in the installation space, the outer wall of the shell is provided with a window and an opening which are communicated with the interior of the storage space, and the opening is used for allowing a detected object to enter the storage space. A first reflecting mirror surface is arranged in the storage space, is arranged on a light diffusion path of the diffusion plate and is used for reflecting light to the side surface or / and the bottom surface of the detected object; the first reflecting mirror surface is arranged on one side, far away from the window, of the diffusion plate so as to reflect a side image or / and a bottom image of a detected object out of the window; the utility model mainly solves the problem of how to realize a function of acquiring images in multiple directions on a detected object in a low-cost manner.

Description

Technical Field

[0001] This utility model relates to the technical field of light sources, and in particular to a shadowless light source device for multi-directional illumination. Background Technology

[0002] Currently, in the field of machine vision inspection, there are generally two methods to achieve visual inspection of multiple angles (i.e., multiple faces) of an object. The first method involves setting up multiple workstations, each equipped with a light source and camera. Each workstation's light source and camera illuminate a corresponding face of the object and acquire images, enabling defect detection across multiple faces. However, this method is inefficient because the object needs to be moved sequentially between workstations. The second method involves placing the object inside a light source, which simultaneously illuminates multiple faces. Windows are positioned at the locations of the faces to be inspected, and a camera is placed outside each window during testing. Multiple cameras and a single light source are used to detect defects across multiple faces. This method is more efficient than the first. However, both methods require multiple cameras to acquire images from multiple angles, resulting in high costs. Therefore, improvements to existing technologies are needed. Utility Model Content

[0003] This invention provides a shadowless light source device with multi-directional illumination, which mainly solves the technical problem of how to achieve the function of image acquisition from multiple directions on the object being tested in a low-cost manner.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A shadowless light source device with multi-directional illumination includes a housing, a lamp plate, and a diffuser plate. The diffuser plate is disposed inside the housing and divides the internal space of the housing into an installation space and a storage space. The lamp plate is fixed within the installation space. The outer wall of the housing is provided with windows and openings that both connect to the storage space. The openings allow an object to be detected to enter the storage space. The windows allow a camera to capture images of the object located in the storage space. A first reflective mirror is disposed within the storage space. The first reflective mirror is disposed on the path of light diffusion of the diffuser plate and is used to reflect light to the side and / or bottom surface of the object to be detected. The first reflective mirror is disposed on the side of the diffuser plate away from the window so that the side image and / or bottom image of the object to be detected can be reflected outside the window.

[0006] In one of the technical solutions, the diffusion surface of the diffuser plate is arc-shaped. After the light emitted by the lamp plate passes through the diffuser plate, part of it illuminates the top and side surfaces of the object being detected, and the other part illuminates the first reflective mirror surface.

[0007] In one technical solution, the first reflective mirror extends in an arc shape, and the object being detected is provided with the first reflective mirror on at least two opposite sides, so that the first reflective mirror can simultaneously reflect both the side image and the bottom image of the object being detected outside the window.

[0008] In one of the technical solutions, the installation space is annular, the lamp panel is arranged in a ring within the installation space, the diffuser plate is annular, and the first reflector is a bowl-shaped structure recessed away from the diffuser plate.

[0009] In one of the technical solutions, the outer casing has an opening on the side opposite to the window, and the opening penetrates the first reflective mirror surface of the bowl-shaped structure.

[0010] In one of the technical solutions, the outer casing has a second reflective mirror on the inner wall of the installation space, and the second reflective mirror is arranged in a ring.

[0011] In one of the technical solutions, the illumination direction of the lamp panel is downward, and the housing is provided with an annular second reflective mirror on the side wall within the installation space.

[0012] In one technical solution, the outer casing includes a housing and a top cover. The lamp plate is fixed to the bottom of the top cover. One end of the diffuser plate is fixed to the side wall of the housing, and the other end of the diffuser plate is fixed to the bottom of the top cover. The housing, the top cover, and the diffuser plate together form the annular installation space. An annular second reflective mirror is provided on the inner side wall of the housing. The window is opened on the top cover, the opening is opened on the housing, and the first reflective mirror is provided on the inner wall of the housing.

[0013] Compared with the prior art, the shadowless light source device for multi-directional lighting provided by this utility model has at least the following beneficial effects:

[0014] Before use, the object to be detected is placed inside the housing through an opening in the light source device of this solution. Alternatively, the light source device can be placed over the object, allowing it to enter the housing through the opening. The camera is positioned to one side of the window. During use, the light emitted from the light panel is evenly diffused through a diffuser plate. Part of the diffused light directly hits the upper and side surfaces of the object, while the other part is reflected by a first reflecting mirror on the inner wall of the housing to the side and / or bottom surface of the object. This achieves uniform illumination of the object from multiple angles. With shadowless illumination, the camera can directly acquire the top image of the object being inspected through the window. Simultaneously, the side and / or bottom images of the object are reflected outside the window by the first reflecting mirror and can be acquired by the camera. Therefore, the camera can also acquire the side and / or bottom images of the object at the same time. In other words, with this solution, only one camera is needed to acquire images of multiple surfaces of the object being inspected, such as the top, side, and / or bottom, without the need for multiple cameras. Therefore, this solution has the advantage of low cost while achieving multi-directional detection of the object being inspected. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of a shadowless light source device for multi-directional illumination provided in an embodiment of this application;

[0017] Figure 2 A schematic diagram of the optical path of a shadowless light source device for multi-directional illumination provided in this application embodiment during operation;

[0018] Figure label:

[0019] 1. Outer shell; 11. Installation space; 12. Storage space; 13. Window; 14. Opening; 15. First reflecting mirror; 16. Second reflecting mirror; 17. Shell; 18. Top cover; 2. Lamp panel; 3. Diffuser plate; 31. Diffuser surface; 4. Object being detected; 5. Camera. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Please refer to the following: Figure 1 and Figure 2This utility model provides a shadowless light source device for multi-directional illumination, mainly including a housing 1, a lamp plate 2, and a diffuser plate 3. The diffuser plate 3 is disposed inside the housing 1 and divides the internal space of the housing 1 into an installation space 11 and a storage space 12. The lamp plate 2 is fixed inside the installation space 11. The outer wall of the housing 1 is provided with windows 13 and openings 14 that both connect to the storage space 12. The openings 14 allow the object 4 to be detected to enter the storage space 12, and the windows 13 allow a camera 5 to image the object 4 located in the storage space 12. In addition to the acquisition, a first reflecting mirror 15 is provided inside the storage space 12. The first reflecting mirror 15 is located on the path of light diffusion of the diffuser plate 3. Furthermore, the first reflecting mirror 15 enables the light diffused from the diffuser plate 3 to be reflected to the side and / or bottom surface of the object being detected 4. In addition, the first reflecting mirror 15 is also located on the side of the diffuser plate 3 away from the window 13, so that in addition to providing illumination to the side and / or bottom surface of the object being detected 4, the first reflecting mirror 15 also serves to reflect the side image and / or bottom image of the object being detected 4 to outside the window 13.

[0026] Please see Figure 2 Specifically, before use, the light source device of this solution places the object to be detected 4 through the opening 14 into the storage space 12 inside the housing 1, or covers the object to be detected 4 outside the opening 14 into the storage space 12 inside the housing 1. The camera 5 is arranged on one side of the window 13. During use, the light emitted by the lamp plate 2 is evenly diffused through the diffuser plate 3. Part of the diffused light shines directly onto the upper surface and side of the object to be detected 4, and the other part of the diffused light is reflected by the first reflecting mirror 15 on the inner wall of the housing 1 to the side and / or bottom surface of the object to be detected 4, thereby realizing the detection of the object 4. With uniform shadowless illumination from multiple directions, camera 5 can directly acquire the top image of the object being inspected 4 through window 13. At the same time, the side and / or bottom images of the object being inspected 4 will be reflected outside window 13 by the first reflecting mirror 15 and can be acquired by camera 5. Therefore, camera 5 can also acquire the side and / or bottom images of the object being inspected 4 simultaneously. In other words, with this solution, only one camera 5 is needed to acquire images of multiple surfaces of the object being inspected 4, such as the top, side and / or bottom, without the need to set up multiple cameras 5. Therefore, this solution has the advantage of low cost while achieving multi-directional detection of the object being inspected 4.

[0027] Please refer to them again. Figure 1 and Figure 2The shape of the diffusion surface 31 of the diffuser plate 3 is preferably arc-shaped. The arc-shaped diffuser plate 3 has the characteristic of a large diffusion area, so that the light emitted by the lamp plate 2 can illuminate the top and side surfaces of the object to be tested 4 more extensively after passing through the diffuser plate 3, and can also illuminate the first reflective mirror surface 15 more extensively, thereby improving the uniformity of illumination on each surface of the object to be tested 4.

[0028] Please refer to them again. Figure 1 and Figure 2 The first reflecting mirror 15 extends in an arc shape, and the object to be detected 4 is provided with the first reflecting mirror 15 on at least two opposite sides, so that the first reflecting mirror 15 can simultaneously reflect both the side image and the bottom image of the object to be detected 4 to outside the window 13. Taking at least one pair of first reflecting mirrors 15 in the left and right directions as an example, the left first reflecting mirror 15 is used to simultaneously reflect the light from the diffuser plate 3 to the left side and bottom surface of the object to be detected 4. After the left side of the object to be detected 4 is illuminated, the image will be reflected by the left first reflecting mirror 15 to the camera 5 outside the window 13, so that the camera 5 can acquire the image of the left side of the object to be detected 4. After the bottom surface of the object to be detected 4 is illuminated by the light reflected by the left first reflecting mirror 15, the image will be reflected by the right first reflecting mirror 15 to the camera 5 outside the window 13, so that the camera 5 can acquire the image of the bottom surface of the object to be detected 4. Similarly, the first reflecting mirror 15 on the right is used to reflect the light from the diffuser 3 onto the right side and bottom side of the object being detected 4. After the right side of the object being detected 4 is illuminated, the image will be reflected by the first reflecting mirror 15 on the right to the camera 5 outside the window 13, so that the camera 5 can capture the image of the right side of the object being detected 4. The image of the bottom side of the object being detected 4 after the light reflected by the first reflecting mirror 15 on the right will be reflected by the first reflecting mirror 15 on the left to the camera 5 outside the window 13, so that the camera 5 can also capture the image of the bottom side of the object being detected 4.

[0029] Please refer to them again. Figure 1 and Figure 2 In this embodiment, the installation space 11 is preferably annular, with the lamp panel 2 arranged in a ring within the installation space 11, the diffuser plate 3 also having a ring-shaped structure, and the first reflecting mirror 15 having a bowl-shaped structure recessed away from the diffuser plate 3. This design ensures that all sides and the entire bottom of the object being inspected 4 can be illuminated and reflected by the first reflecting mirror 15, allowing the camera 5 to capture images. In other words, the light source device using this solution can achieve omnidirectional, shadowless illumination of the object being inspected 4 and omnidirectional image acquisition, significantly improving the efficiency of multi-directional visual inspection of the object being inspected 4.

[0030] Please refer to them again. Figure 1 and Figure 2 Preferably, the outer casing 1 has an opening 14 on the side opposite to the window 13. In practice, the opening 14 penetrates the first reflective mirror 15 of the bowl-shaped structure. In other embodiments, the opening 14 can also be located in other positions, such as on the side of the outer casing 1. Preferably, the outer casing 1 has a second reflective mirror 16 on the inner wall of the mounting space 11. The second reflective mirror 16 is also arranged in a ring shape. By providing the second reflective mirror 16, the brightness of light diffusing outward from the diffuser plate 3 can be improved, thus improving the light utilization rate and resulting in better shadowless illumination. Preferably, the illumination direction of the lamp plate 2 is downward, and the outer casing 1 has a ring-shaped second reflective mirror 16 on the side wall of the mounting space 11.

[0031] Please refer to them again. Figure 1 and Figure 2 The outer casing 1 specifically includes a housing 17 and a top cover 18. The lamp panel 2 is preferably fixed to the bottom of the top cover 18. One end of the diffuser plate 3 is fixed to the side wall of the housing 17, and the other end is fixed to the bottom of the top cover 18. The housing 17, the top cover 18, and the diffuser plate 3 together form the aforementioned annular mounting space 11. The inner side wall of the housing 17 is provided with the aforementioned annular second reflective mirror 16. A window 13 is opened on the top cover 18, and an opening 14 is opened at the bottom of the housing 17. The inner wall of the housing 17 is provided with the aforementioned first reflective mirror 15. This design of the outer casing 1 facilitates the installation of the lamp panel 2 and the diffuser plate 3, and also facilitates the placement of the first reflective mirror 15 and the second reflective mirror 16.

[0032] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.

Claims

1. A shadowless light source device for multi-directional illumination, characterized in that, The device includes a housing, a light panel, and a diffuser plate. The diffuser plate is disposed inside the housing and divides the internal space of the housing into an installation space and a storage space. The light panel is fixed within the installation space. The outer wall of the housing has windows and openings that connect to the storage space. The openings allow the object to be detected to enter the storage space. The windows allow a camera to capture images of the object located in the storage space. A first reflecting mirror is disposed within the storage space. The first reflecting mirror is disposed on the path of light diffusion of the diffuser plate and is used to reflect light to the side and / or bottom surface of the object to be detected. The first reflecting mirror is disposed on the side of the diffuser plate away from the window so that the side image and / or bottom image of the object to be detected can be reflected outside the window.

2. The shadowless light source device for multi-directional illumination as described in claim 1, characterized in that, The diffuser plate has an arc-shaped diffuser surface. After the light emitted by the lamp plate passes through the diffuser plate, part of it illuminates the top and side surfaces of the object being tested, and the other part illuminates the first reflective mirror surface.

3. The shadowless light source device for multi-directional illumination as described in claim 2, characterized in that, The first reflective mirror extends in an arc shape, and the object being detected has the first reflective mirror on at least two opposite sides, so that the first reflective mirror can simultaneously reflect both the side image and the bottom image of the object being detected outside the window.

4. The shadowless light source device for multi-directional illumination as described in claim 3, characterized in that, The installation space is annular, the lamp panel is arranged in a ring within the installation space, the diffuser plate is annular, and the first reflector is a bowl-shaped structure recessed away from the diffuser plate.

5. The shadowless light source device for multi-directional illumination as described in claim 4, characterized in that, The outer casing has an opening on the side opposite to the window, and the opening penetrates the first reflective mirror surface of the bowl-shaped structure.

6. The shadowless light source device for multi-directional illumination as described in claim 4, characterized in that, The outer casing has a second reflective mirror on its inner wall within the installation space, and the second reflective mirror is arranged in a ring shape.

7. The shadowless light source device for multi-directional illumination as described in claim 6, characterized in that, The illumination direction of the lamp panel is downward, and the housing has an annular second reflective mirror on the side wall within the installation space.

8. The shadowless light source device for multi-directional illumination as described in claim 7, characterized in that, The outer casing includes a housing and a top cover. The lamp plate is fixed to the bottom of the top cover. One end of the diffuser plate is fixed to the side wall of the housing, and the other end of the diffuser plate is fixed to the bottom of the top cover. The housing, the top cover, and the diffuser plate together form the annular installation space. An annular second reflective mirror is provided on the inner side wall of the housing. The window is opened on the top cover, and the opening is opened on the housing. The first reflective mirror is provided on the inner wall of the housing.

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